On Apple Watch pricing and strap swapping

There's a lot we don't know about Apple Watch. We don't know how much it will cost, beyond the $349 price tag Apple's hung on the entry-level Sport model. We don't know if any other straps will be made available, including gold links to match the gold Edition. We don't know if we'll be able to buy additional straps separately so we can take advantage of the stellar strap-swapping mechanism Apple has included in all the collections. We know the broad strokes, but we know few if any of the fine details.